A dry-ordinary high school student ... But he leads hard life, because his parents do not interest him. In addition, he wakes up with the mysterious wounds on the neck and wrist after a strange sleep. In addition, the southern king of the fantasy world faces a serious problem: a lack of blood, which leads to a sharp decrease in its combat power. He must find people and take their blood. Therefore, his servant and the dragon are looking for a person to satisfy their owner. They ultimately meet dry, whose blood is especially sweet. When the dragon asks him to follow them, it agrees dryly to run into his unfortunate life. But there is one snag: the king hates children. The dragon suggests getting dressed in a girlish dry, hoping that the king will not be noticed.